Machine for rolling tubular products



July 25, 1933. M. H. DAMERELL 1,919,636

MACHINE FOR ROLLTNG TUBULAR PRODUCTS Original Filed Sept. 18, 1930 6 Sheets-Sheet 1 jYark I fldmereld' July 25, 1933. M.. H. DAMERELL 1,919,686

MACHINE FOR ROLLING TUBULAR PRODUCTS Original Filed Sept. 18, 1930 6 Sheets-Sheet 2 by QV y 1933. M. H. DAMERELL 1,919,686

MACHINE FOR ROLLING TUBULAR PRODUCTS MW .NErk .H'Domere Z5 fil M01105?! v m M July 25, 1933. M. H. DAMERELL MACHINE FOR ROLLING TUBULAR PRODUCTS Original Filed Sept. 18, 1930 6 Sheets-Sheet 4 z m: w mm L \I q N J 6 .n\\ .\s u s ll. o I Q Q Q h H mm w i i eW s .N\ mm a mm hm fll on N July 25,1933. M H. DAMEQELL 86 MACHINE FOR ROLLING TUBULAR PRODUCTS Original Filed Sept. 18, 1930 -6 Sheets-Sheet, 5

flaw IDamerzZC Mufs Wikrfi July 25, 1933.- M. H. DAMERELL MACHINE FOR ROLLING TUBULAR PRODUCTS Original Filed Sept. 6 Sheets-Sheet 6 F216 [Farr/ere Z6 Patented July 25, 1933 I mink H; nnivi'nniz nrio'n wono'n'srrnn, tressno'nnsnr'rs, ASSIGNOR ".ro Wynn sonnet f comrnnx'orf'woncns'rnn; ivm'ssnenvsn'r'rs, A CORPORATION.QEMASSACHUSETTS MACHINEVFORROLLING TUBULAR i nonuc'rs Applic'ationfilcd September-.1S 198O; Serial no; 4.82.845; Renwea omb r 651932. v

This invention relates to a .-m'achine par;- trcularly designed for forming acketsfor air-cooled engine cylinders from. tubular stock. NVhile particularly designed for the I above. described. work, my. improved'ma-chine isnot limited" in its utility. thereto, but is adapted toithe production of. other work having moreorless similar characteristics. It is the general b ect of my ".lllVQ'IllJlOIl to provide a machine for producing aisleeve or bushing from tubular. stock-.byra rolling or swaging operatiomsu'ch that portions of the original tube are substant ally changed in thickness. In theusual operation of the machlne, some parts of the tubular stools; 11i.- creases in thickness and other parts are reduced in thickness. V p I My invention further relatesto improved work-supporting, operating and control devices which the use'off the machine is much facilitated. s I 1 r v My. invention further relates to arrangements andlcomb'inations ofparts which will 'be hereinafter described and more particu' larly pointed outin the appended claims;

A preferred form of. the. invent-ion is shown int'he drawings,.in. which Fig. '1 machine; 1 v 30 Fig. ,2..is an end .elevationppartly insection, taken along the line 22 in Fig. 1;

-F ig..3 is a sectional plan view. of certain parts, taken along the line 3--.- 3 in Fig.2.;

Fig. 4 isea [rear elevationofcertain'worln V sup ortingdevices, looking, in the direction of the. arrow 4 in Fig. 2";

' Fig. 5'isa partialplan view of firework supporting devices, looking in the direction of the arrow"5"in-'Figr 9);

Fig; 6"is anendzelevation, partly section-, a-nc1 simila-r to Fig. 2, but showing'the parts-in a different operative' relationg' F ig.= 7 is a "detaillsectional elevation of certain parts shown in FigQG'but in asti'll diiteren't operative'relationy Fig. 8 is -a side elevation offa' product: of the machine; i Fig. 9.:' is asectional front, elevation' of certain speedv reducing: driving mechanism' FigrlQ is a-n end elevation, partlyinzsec i-valvie mecha is azrear elevation of improved I h Referring to Flg. 1, my improved machine iary base or frame. niemberf'21.whileftlie direct on the base 20. l

swaging. machine comprises fupper M15 22 described.

non, taken lon tl1e 1ine..101O in-Fig. 1

and" looking in the direction ofthearrow 10 in 9;. i

Fi 11 isa sectional planviewoii certain nism,."taken along the line.;, 5 lf1+11 in-Figs; 9andl0'g' Fig. 12 isfan' enlarged rear: elevation'of;

ithe. swaging r0118. partly. in sectionfand looking in the "direction. of they arrow12 in is adetail sectional end view,

"takenalongthe line 13- 13 in Fi'g. 12;

Fig. 14: isa detail plan view, looking in gthe direction of the arrow l tini Fig. 12

F 1g. 15 is a sectional plan fview'of certain.-

15 mandrel operating' mechanism} c I F 16 is a detail sectionalsidelelevatioii of certain connecti0n's,.talren along the line 16%16 in Fig. 15"; F ig. 17 isv a detail sectionallview taken along the line 17.1-7in Fig. 16; l Fig. 18 is an enlargedfront, never-los r certain hydraulicvalve/mechanism;and 'Fig..19 is a planview thereof, partly. in section looking in th'e directionof the r ow 19 Fig. 18.

Genemloonstruction of 'mackinefl comprises, a base orframe, 20' on which is 3) nism M. speed reducing and .powertra'ns- .mittiiig, mechanism P,',.and rolling. or swag-- ingcmechanism R. Thesmot'or. and gear ing P f are; preferably mounted on an auXilrolling; mechanism R is preferably mounted Briefly described," my improvedlrollinglor (Fig. 2) mounted. in .fixedp'ositi on. vertically, and .lowerrolls 28 mounted for, raising! or, lowering floy hydraulic mechanismto. he

. he work, W is temporarily supported 45 armsuntil a inandrel (Finn is in- 'serte d therein,v after which. the arms '25 are automatically withdrawn. "lherolls 2i? and 23' are "all "*1"ot :-).ted at the" same: speedby the m t-. M and the rolls-i 23 -r igrw le .;5

forced upward by hydraulic pressure until they reach a definite upward limit of movement. By this combined rotating and upward movement the rol s shown in the drawings produce changes in section in the work .W, so that the final producthas the appearance indicated in Fig. 8. With rolls of different contour, the finished work may be given a different section.

' Work driving mechanism Having thusbriefly described the general construction and operation of my improved machine, I will now describe the details of construction thereof, beginning with the work driving mechanism best shown in Figs. 1 and 9. r

The motor M previously mentioned is direct connected to a shaft 33 (Fig. 9) having a bearing 34 in a gear casing 35. A second shaft 36 is supported in fixed bearings in alignment with the shaft 33, and the end of the shaft 33 is received in a bearing recess 37 in the end of the shaft 36.

The shaft 33 is connected by a pinion 38 and gear 39 to a countershaft 4O rotatable in hearings in the lower part ofthe casing 35. A pinion41 and friction clutchmember 42 are secured together and are freely rotatable on the shaft 40. A clutch member 43 is keyed to the shaft but is slidable thereon to engage the clutch member 42.

A yoke arm 45is mounted on a cross shaft 46 which extends rearward through the casing35 and is provided with an arm 47 connected to a piston rod 48 extending into a pneumatic cylinder 49 and connected to a piston 48 (Fig. 10) therein. When air is admitted to the lower end of the cylinder 49, pressure is applied to cause, the clutch member 43 to firmly engage the clutch member 42, and when pressure is applied to the upper end of the cylinder, the clutch members are separated.

The air connections and the manual control thereof will be hereinafter described.

The pinion 41 (Fig. 9) engages a gear 50 on the shaft 36 previously described. This shaft 36 is also provided with a pinion 52 fixed to rotate therewith and engaging a cluster of pinions 53, mounted on two upper shafts 54 and two lower shafts 55, all rotat able in fixed bearings in the frame of the transmitting unit'P.

The shafts 54 are con'nected by shaft extensions 56 (Fig. 1) to drive the upper forming rolls 22 and the shafts are connected by extensions 57' to drive the lower forming rolls 23. The shafts 55 and 57 are joined together by universal joints 58, rendered'necessary' by the rising and falling movement of the lower rolls 23.

LWorle positiom'ng and supporting devices In order to facilitate the insertion of work in the machine, I provide the work-supporting arms 25, best shown in Figs. 2, 4 and 5. The arms 25 are connected together by a cross rod 60 (Fig. 5) and are pivotally connected at their rear ends to upwardly extending arms 61 mounted on a cross rod 62,

.pivotally mounted in fixed bearings 63 firmly in engagement with the rolls 67 and a spring 72 (Fig. 4) mounted on the cross rod 62 acts to yieldingly move the arms 25 rearward from work-supporting position. A stop screw 73 (Fig. 2) engages a fixed part of the machine and limits such rearward movement.

A forwardly projecting lug 74 on the cross rod 62 is engaged by a downwardly moving part to be described as the rolls 23 are'lowered and the arms 25 are thus caused 'to move forward to work-supporting position.

Worhsuppmting mandrel and operating mechanism therefor 1 After the work is positioned by the arms 25, a mandrel 30 (Fig. 15) .is inserted in the work. This mandrel 30 is rotatably supported in aligned bearing sleeves 81 and 82 (Fig. 15) mounted in the front and rear bearing members 83'and 84.

The mandrel 30. has a swivel connection 85 with the enlarged head 86 (Figs. 16 and 17) of a link 87, which in turn is pivotally connected to a cross head 88. Piston rods 90 are secured'to the opposite ends of the cross head 88 and pistons. 91 on said piston rods are slidable in parallel cylinders 92, mounted on the bearing member 83 and at each side of the connecting link 87.

Pipes 94 and 95 (Fig. 1) are connected to the front and rear ends of both cylinders 92. When air under pressure is admitted through the pipe 94, themandrel 30 will be withdrawn in the bearing 83 to inoperative position, and when air under pressure is admitted through the pipe 95, the pistons 91 will be moved to the position indicated in Fig. 15 and the mandrel 30 will be inserted through the. work W and into the aligned bearing 84, in which position it will firmly support the work during the rolling o-r swaging operation. During this operation, the mandrel 3O'is freely rotatable, due to its swivel. connection with the link 88.

Pneumatic control mechanism The mechanism for controlling the clutch member .13 and the mandrel is best shown in Figs. 10 and 11. A pipe 96 from a supply of air under pressure is connected to inlet'ports 97 and98 in ;a valve casing 99.

The pipes 9-1 and .95 previously mentioned areconnected to ports 100 and 101 respec- .tively, the ports '97, I 100 and lO l entering a cylindrical opening 102 in which a-piston valve 103 is s'lidable. i

The valve 103 is connected by a link 1-04.

(Fig. 9.) to a manually operated handle or lever 105. When the valve 103 is in theposition shown in Fig. 11 air under pressure will flow from the pipe 96 through the ports 97 and 101 to the pipe 95 which will coni duct the air to the outer vend .o-f vthe cylinders 92 (Figs. 1 and 15 while at thesaine timethe pipe 9 1- Will be opened through the 'p0rt100 to the cylind-ricalrecess 102 be-v viously described;

Rolling 0,1 swaying mechanism The rolling o'r swaging mechanism come prises the upper rolls 22 and lower rolls 23 previously described.

a i The upper rolls 22 are mounted fixed bearings (.F 2) secured to the under side of a topframe member 121. The frame member 121 is mounted 'on posts or standfards 122 (Fig. 3) preferably of U-shaped section and'firmly supported at their lower ends on the base'20 of the machine.

The lower rolls 23 are mounted in bearings123 (Fig; 2) supported by a rocking frame or cradle "124 (Fig. 3) J pivotally mounted on a cross shaft 125 suitably sup-I ported in bearings 126 in members 127 pro je'cting upward from the movable head 128 of the hydraulic lifting mechanism. The members 127 are recessed at their outerends to engage finished corner surfaces 129 of the standards 122, by which the members 127 and .cylinder'head 128 are guided vertically.

. The hydraulic lifting mechanism cornprises inner and upper hydraulic chambers l30aI1d 131(Fig. 2). An inner piston 133 is sl idable in the inner chamber 13.0and is ,mounted on, a piston rod 134,:havin an axial passage 135 extending therethroug- :Atits 1 is connected into "lolwerend the passage 1-35 isopen to loper portiol i of the chamber below the piston 133 and at its upper end the passage iconnects to a'ibr'anch passage 136which opens into the upper"hydraulictchamber 131. The

chambers130- nil-131 are thus always in direct communication.

U A pipe 1410 is connected the "lower pertionof the inner chamber l30-andapipe141 chamber130. The chamber 130is surrounded by afixed casing 142, and the cylinder "head 128 is provided with-a depending annau lar flange OI';$ l66VG 144 slidab'ly fitting the outside of the fixed casing member the upper portion bf the"- Suitable packing is provided for the relatively movabljeparts. 1 When water or other liquid'under pressure is adi-i'iitted'through the pipe and under the piston 1335 the piston will be raised, carrying the swaging rolls 23' up- Ward against the Work At the same time liquid under pressure will-flow upward "through the passages 135 and 136 to the upper cylinder 131 where it will apply upward'pressu-re againstthe cylinder head128,

,w-h-ichis of substantially larger cross section I that the piston 133 By this provision of double or telescoping cylinders, I more than double-the forceof the hydraulic mechanism. gDuring lifting this upward movement the pipe 111 is {connecteclto the exhaustandthe liquid cone tai-ned in the upper portion of the cylin dei l30 fio; ws "out through this connection.

hen the ro;l ls':23 are to be lowered,I-the pipe 14:1 is connected to supply a liquid under pressure and the pipe 140 is connected to the exhaust. During the downward movement of 'the cylinder-head 128 and piston 133' theliquid contained in the upper chamber 131 escapes to "the innercylinder through the connections 136 and- 135, and the liquid in both cylinders then escapes through the exhaust pipe 140. An abutment 1 46 limits downward movement of the piston 133,,and a spring 147 cushions the final downward movement.

1 alpe mechanism I Thevalve nechanismfor controlling the hydraulic lifting mechanism is "best shown in Fi-gsJ, 18 and19; 'Th ispvalve mechaf nism comprgises'a valve'casing 150 having recesses lcl and 152, to whichfthe'pipes 14:0 and 1 11 are respectively connected." The casing 150 has an additional recess or passage 153 to which an exhaust pipe is connected. 7 A piston valve 155' is slidabl'e in a sleeve 1:56 fitted a cylindrical opening the casing 150. The sleeve 156 is provided with .end ports 157 connected by transverse passagesu158' to the ex haust ipassage 1153 and exhaust pipe 151, The'sleeve1 56 also has centrally located inlet port 160 connected through a passage 161 to an inlet pipe162 (Fig. 18).

Additional ports 164; and 165 in the sleeve 156 are connected by transverse passages 166 and 167 to the recesses 151 and 152, through which they are connected to the pipes-110 and 14:1.previously described.

The valve 155 is provided wlth an exte'nsion 170 by which it is connected to a hand lever 171 (Figs. 1 and 18). When the valve 155. is shifted to the position shown in Fig. 1

direction, the connections are reversed and 'the rolls Wlll be lowered.

Mandrel support S ecia-l revision is made for su ortin I the mandrel 30 (Fig. 15) and its actuating cylinders 92 in such manner that it may be raised and lowered within limits and that the mandrel may also adjust itself laterally to center the work between the four cooperating swaging rolls. For this purpose, the bearing members 83fand 8 1 (Figs. 12 and 13)are mounted on rock arms 180 and 181 pivoted at their upper ends on studs 182 in blocks or brackets 183, freely slidable vertically in T-slots 184; (Fig. 14:) in the top frame member 121 previously described. r

The mandrel 30 and the work support thereonare thus freely movable vertically and also transversely and allow the work to center itself in all directions between the cooperating swaging rolls.

Operation Having described the details of construction of my improved machine, the method of operation is as follows:

The rolls 22 and 23 will be shaped on their periphery as required by the particular work to be produced. Assuming that the parts are in the position shown in Fig. 2, the work is placed in thearms or supports 25, and the lever 105 is shifted to admit air tothe cyll of the lower rolls 23.

It will be noted that the cylinder head 128 (Fig. 2) is provided with a bracket 190 which engages the offset projection 74 on head 128 starts to rise, the spring 72 (Fig. fl) acts to withdraw the work supporting I arms to the positlon shown'in Fig. 6. The

rolls 23 move gradually upward under hydraulic pressure to the position shown in Fig. 6, in which position all of the rolls 22 and 23 engage the work VV'mounted on the freely rotatable mandrel 30.

The rocking support of the roll 23 enables them to equalize their pressure on the work YV and the movable support of the mandrel 30 allows the work to be pushed upward and centered against the upper rolls 22 which rotate on fixed axes.

The mandrel bearing members 83 and 8 1- are provided with cylindrical end portions 195 (Fig. 12) adapted to engage reduced portions 196 of the upper rolls 22 as the mandrel is pushed upward and adapted to be engaged by similar reduced portions 197 These parts 195,196 and 197 cooperate as indicated in Fig. 7 to limit the upward movement of the lower rolls and to center the mandrel 30 and work W accurately between the four rolls.

After the parts 195. 196 and 197 are thus firmly engaged, the rolls are further rotated for a certaintime and this further rotation is found effective to slightly enlarge the internal diameter of the work, loosening it from the mandrel 30 to such an extent that the mandrel can be withdrawn.

)Vithout such further rotation of the rolls after upward movement of the lower rolls is stopped, the work has the effect of being shrunk on the mandrel, and removal of the mandrel from the work is extremely difficult. The gradual upward movement of the rolls underhydraulic pressure, along with the freerotationof the mandrel and the self-centering of the work between the rolls, causes the metal to flow gradually from the plain tubular section indicated in F 5 to the finished section indicated in Fig. 8, the product representing an external 'jacket for an airplane engine cylinder. The

product thus produced is squared off at the ends and is afterwards slotted longitudinally through its enlarged middle section to receive cooling vanes.

lVhile I have shown my invention as adapted to produce jackets for airplane engine cylinders, it will be readily understood that the machine is of more general application and that many other articles of more or less similar nature may be rapidly and economically produced by the use of my in1- proved machine." I '2 When the cylinderv head 128 i Having thus described my" the advantages thereof, I do not "wish'to be limited to the details herein disclosed otherwise than as set forth in the claims, but what l claimisz a 1. A machine for rolling and swaging tubular Work which comprisesa: mandrel, meansto rotatably support saidunandrel,

a plurality of rollsspace'd about said-man means is provided for inserting and removing the mandrel axially of the-work. Y

The combination in a rolling and swaging machine as set forth in claim '1, in which power-driven mechanism is provided for inserting and withdrawing themandrel. 1

1. The combination-in a rolling and swaging machine as set forth in claim 1 in which means is provided for preliminarily supporting the. work in alignment with the axis of the mandrel. i

5 The combination in a rolling and swaging machine as set forth in claim 1 in which means is provided for preliminarily supporting the work in alignment with the axis of the mandrel, and means for automatically withdrawing said supporting means as the swaging rolls are advanced to engagethe work.

6. A machine for rolling and swaging tubular work which comprises a pair of upper rolls, fixed bearing supports therefor, a pair of lower rolls, a cradle mounting said lower rolls in the machine, and means to move said cradle upward to move said lower rolls against a piece of work and force the piece of work against the upper rolls.

7. A machine for rolling and swaging tubular work which comprises a pair of upper rolls, fixed bearing supports therefor, a pair of lower rolls, a bearing support for said lower rolls mounted to'swing about a hoizontal axis parallel to said rolls, and means to raise said lower rolls and thereby force a piece of work upward against the upper rolls.

8. A machine for rolling and swaging tubular work which comprises a pair of upper rolls, fixed bearing supports therefor, a pair of lower rolls, a bearing support for said lower rolls mounted to swing abo it a horizontal axis parallel to said rolls, and hydraulic means to move said support and lower rolls forcibly upward against the work and to move the work upward against the upper rolls. I

9. A machine for rolling and swaging tuinvention and bular work which comprisesa pair of upper rolls, fixed bearing supports therefor, a .pa-ir oflower rolls, a bearing 's'upport for said lower rolls mounted to swing-about a hori-' zontal' axis parallel tosaidlrolls,-a' hydraulic lifting mechanism on whichs'aid lower rolls I are pivo'tally mounted, and means to supply a liquid under pressure to said lifting mech anismto raise said ro'llsagainst the work;

10. In a -machine for rolling and I swaging tubular work, a mandneh-a pairof upper rolls, a pair of lower-rolls,-and meansto raise said lower rolls, means to support. and mount said mandrel for free vertical and transverse movements, and means to support and mount said lower i-ollsforswin'ging movement as a unit transversely to equalize engagement thereof-with the work. a v 11. In a machine for rolling and swaging tubular work, a pair pf lower rolls,'a cylinder head on which said rolls are supported, a piston fixed to said head, an'upper'chamber underlying said .head, an inner chamber enclosing said piston, and; means'* to admit a liquid underpressure 'to both chambers simultaneously" to lift said lower rolls;

12. The combination in a rolling and swaging machine, as set forth in claim 11 in which means are provided to admit liquid under pressure to the upper part of the inner chamber only to lower said rolls.

13. A machine for rolling and swaging tubular work which comprises a mandrel, means to rotatably support said mandrel including bearings mounted for free swinging about a pivot parallel to the axis of the maridrel, whereby said mandrel may effect a lateral self-adjustment, a pluralityv of rolls spaced about said mandrel, means to rotate said rolls, and means to cause said rolls to relatively approach and forcibly engage the work on said mandrel.

14. A machine for rolling and swaging tubular work, which comprises a mandrel, means to rotatably support said mandrel including bearings for said mandrel in which said mandrel is mounted, said bearings being mounted in the machine for free swinging movement about a pivot parallel to the axes of the mandrel and for vertically slidable movement, whereby said mandrel may effect a lateral self-adjustment, a plurality of rolls spaced about said mandrel, means to rotate said rolls, and means to cause said rolls to relatively approach and forcibly engage the work on said mandrel.

15. In a machine for rolling and swaging tubular work, upper and lower sets of form ing rolls, means to support one set of said rolls for rotary movement on fixed axes, means to support the other set for movement on vertically movable axes, said last means being supported for rocking movement whereby said second set of rolls will be self-adjusting, and means to drive all of duo said rolls simultaneously and at the same peripheral speed.

16. In a machine for rolling and swaging tubular work, upper and lower sets of formingrolls, means to supportone set of said rolls for rotary movement on fixed axes, means to support the other set for movement on vertically movable axes, said last means being supported for rocking movementwhereby said second set of rolls will be self-adjusting, and means to drive all of said rolls simultaneously and at the same peripheral speed, said driving means including universal connections to the movably mounted rolls effective to permit the vertical adjustment thereof.

neously and at the same peripheral speed, means to relatively move said rolls toward the axis of said mandrel, and means to limit the approach of said rolls, and mandrel while permitting continued rotation of said parts.

18. A machine for rolling and swaging tubular work which comprises a mandrel, means to rotatably support said mandrel, a plurality of rolls spaced about said mandrel, means to rotate said rolls, and means to cause said rolls to relatively approach and forcibly engage the work on said mandrel, means for preliminarily supporting the work in alignment with the axis of the mandrel, means for moving said mandrel relative to the work, means including bearings for said mandrel mounted for swinging movement about an axis parallel to the axis of the mandrel whereby said mandrel is self-adjustable, and means for automatically withdrawing said supporting means from the work as the swaging rolls are advanced toward the work and mandrel.

MARK H. DAMERELL. 

